12th Gen Intel Core i7 1255U

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  • Boost/Base Clock: 3.5 (E-Cores), 4.7GHz (P-Cores) / 1.2GHz (E-Cores), 1.2GHz (P-Core), 1.7GHz (P-Cores)
  • Core/Thread Count: 10 Core / 12 Thread
  • Cache: 928KB of level 1 cache + 18.5MB of level 2 cache + 12 MB of L3 Cache
  • TDP: 15 Watts
  • Memory Speed: DDR4 3200MHz, DDR5 4800MHz, LPDDR4X 4267 MHz, LPDDR5 5200MHz
  • CPU Socket: BGA1700
  • CPU Transistor size: 10 Nanometers
  • CPU Series: Alder Lake

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Last updated on January 6, 2022 7:20 AM
12th Gen Intel Core i7 1255U



12th Gen Intel Core i7 1255U | Review

12th Gen Intel Core i7 1255U ReviewLaunched in January of 2022, 12th Gen Intel Core i7 1255U is a high-end processor for laptops powered by 2 performance cores with 4 threads and 8 efficiency cores with 8 threads. The performance core has a base clock of 1.7 GHz and a boost clock of 4.7 GHz the efficiency cores, on the other hand, have a base clock of 1.2GHz and a boost clock of 3.5GHz. 12th Gen Intel Core i7 1255U is based on the 10 nm architecture with this the 12th Gen CPUs see an average IPC gain of 19 percent the higher IPC allows the Alder lake CPUs more performance at the same clock speed. The TDP of this Chip as specified by intel is 15 watts and can go up to 55 Watts. It also has support for new faster DDR5 memory of up to  4800MHz and low power LPDDR5 5200MHz while also supporting DDR4 memory of up to 3200MHz and low power LPDDR4X 4267MHz. Other Key Features Include Intel Iris Xe Graphics 80EUs and support for USB 4 (40Gbps).

Integrated GPU

IGPU: Intel Iris Xe Graphics G7 96EUs 

12th Gen Intel Core i7 1255U is powered by Intel Iris Xe Graphics G7 96EUs. Based on Intel’s 12th Gen Xe architecture Intel Iris Xe Graphics G7 96EUs features 96 Execution Units, 768 Shader Units, 48 TMUs, and 24 ROPs.  The performance of the Intel Iris Xe Graphics G7 96EUs Graphics depends on a number of factors such as the configured TDP, Clock Speed, Cooling Solution, and RAM configuration. The integrated GPU greatly benefits from fast dual-channel memory.

How is 12th Gen Intel Core i7 1255U  for gaming

The real performance of the Intel Iris Xe Graphics G7 96EUs is similar to that of the Mx350 in terms of gaming. This means you should be able to play titles such as GTA 5 at 60 FPS at (1366×768) and Fortnite at 50+ FPS at (1280×720).


Benchmarks | 12th Gen Intel Core i7 1255U


The GeekBench Single-core score can be used to estimate the real-world performance of day-to-day applications such as Ms word, Google Chrome, and several games. The GeekBench Multi-core score can be used to estimate the real-world performance of a CPU under professional workloads such as data compression, 2d/3d rendering, machine learning, and physics simulation(CAD applications).

Geekbench 5 Single Core

Geekbench 5 Multi-Core


Blender is an open-source digital content creation software for 3D-Modeling, Animation, Rendering, Video Editing & Compositing Solutions on the market. Blender has its own benchmarks and is used to measure the rendering capabilities of a CPU or GPU. The following bars indicate the time is taken to render a scene ( Less is better).

Cinebench R23 | Benchmark

Cinebench R23 benchmark is the updated version of Cinebench R20 now with AVX instruction set support based on Cinema 4D. Cinebench R23 Single-core benchmark measures the responsiveness of the software under the active workload. The multi-core benchmark on the other hand measures the CPU’s ability to handle tasks such as rendering, encoding, and other workloads that benefit from better multi-threaded performance.

Cinebench R23 Single Core | Benchmark

Cinebench R23 Multi Core | Benchmark


Laptops Powered by

See the full list of laptops powered by 12th Gen Intel Core I7 1255U click here.


Specification: 12th Gen Intel Core i7 1255U


Processor/CPU Model

CPU Base Clock

1.2GHz (E-Cores), 1.2GHz (P-Core), 1.7GHz (P-Cores)

CPU Boost Clock

3.5 (E-Cores), 4.7GHz (P-Cores)

CPU Core Count

10 Core

Level 1 Cache


Level 2 Cache


L3 Cache/SLC

12 MB of L3 Cache


15 Watts

CPU Thread Count

12 Thread

CPU Generation


Processor’s Series

Alder Lake


Transistor size

RAM Speed

, , ,

CPU Benchmarks
Geekbench 5 (Multi-core)


Geekbench 5 (Single-Core)


Cinebench R20 Multi Core


Cinebench R20 Single Core


Cinebench R23 (Multi-Core)


Cinebench R23 (Single-Core)


Premiere Pro
PugetBench Premiere Pro Effects


PugetBench Premiere Pro Export


PugetBench Premiere Pro GPU


PugetBench Premiere Pro Overall


PugetBench Premiere Pro Playback


Blender (Less is better)
Blender 2.79


PugetBench Photoshop Filter


PugetBench Photoshop General


PugetBench Photoshop GPU


PugetBench Photoshop Overall


GPU Specs

iGPU Model



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